Quantitative study of Be(II) complexation by soil fulvic acids by molecular fluorescence spectroscopy

• Tipo: Artigo em Revista Científica Internacional
• Data: 1996

Autores

dasilva, jcge (Autor) FCUP; machado, aasc (Autor) Outra; ramos, ma (Autor) Outra; arce, f (Autor) Outra; rey, f (Autor) Outra

Revista

Título: Environmental Science & Technology

Vol. 30

Páginas: 3155-3160

ISSN: 0013-936X

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 17 Citações

Scopus - 26 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

Outras Informações

ID Authenticus: P-001-DE2

DOI: 10.1021/es9507022

Abstract (EN): The interaction of the beryllium ion [Be(ll)] with one of the major constituent of soil organic matter, fulvic acids (fua), was investigated. The complexation of Be(ll) by two samples of fua (amph and gran), at a concentration of 80 mg/L, was monitored by synchronous fluorescence spectroscopy at four pH values (4, 5, 6, and 7). A self-modeling curve resolution technique (evolving factor analysis) was used in the analysis of the sets of spectra collected at increasing Be(ll):fua ratio to obtain concentration profiles that ideally correspond to one type of binding site. These profiles were adjusted to a 1:1 complexation model. Quite strong complexation of Be(ll) by fua occurs at nearly neutral pH (6-7) (logarithm of the conditional stability constant between 5.6 and 6.5), indicating that fua probably affect markedly the mobility of Be(ll) in the environment.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6